利用电池储能辅助传统机组二次调频优化

Combined frequency modulation optimization of conventional units assisted by battery energy storage

负荷侧电量需求的不断攀升以及电网侧新型能源的大量接入给电网的调频能力带来了严峻挑战,仅依靠传统机组进行系统的频率调节已经无法满足电网需求。利用电池储能快速响应、可双向调节的固有特性与传统机组相互配合,可有效改善调频效果。因此,如何设置储能与传统机组相互配合动作的控制策略是十分重要的。针对储能以频率恢复效果最优和电池荷电状态维持情况最佳为目标,建立优化控制策略,同时为减少储能系统的频繁动作,传统机组开始运行后,调速器爬坡率接近最大变化速率时,在保证频率可以得到维持恢复的同时,储能自适应减少动作。通过MATLAB/Simulink搭建储能辅助二次调频的两种典型场景,对方案进行仿真证明,在优化了调频效果的同时使储能SOC得到了维持,同时也减少了储能系统的不必要动作。

The increasing demand for power on the load side and the massive access of new energy on the grid side have brought severe challenges to the frequency regulation capability of the grid.The efficiency of frequency modulation can be improved effiectively by using the inherent characteristics of quick response and bidirectional adjustment of battery energy storage.So how to set up the energy storage unit with traditional reciprocal motion control strategy is very important, for energy storage based on the minimum frequency regulation difference and battery charged state to maintain the best optimization control strategy is established with the target, at the same time to reduce the storage of frequent action, at the beginning of the traditional unit, the speed rate of climb close to the maximum rate of change,Energy storage self-adaptation makes up for the lack of frequency response of conventional units.Two typical scenarios of energy storage assisted frequency modulation were set up by MATLAB/Simulink, and the simulation of the method proved that the strategy in this paper not only optimized the frequency modulation effect, but also maintained the energy storage SOC, and reduced the unnecessary actions of the energy storage system.